I had the procedure done about 5 years ago and I'm down to one implant left. After the other 3 failed, I can say that one of them was my fault but the others I just feel were not seated properly and from what I researched I think 2 of my implants the dentist burned the bones so they inevitably failed. In fact the 1st one failed within 6 months and I knew walking out the day of the procedure something wasn't right with it but I was told it was just "healing".
I started getting bone protruding hurting so I called to see about going in and was told he couldn't see me till Monday. So I asked for my pain medicine to be refilled since I had to get through Friday till Monday. And the receptionist politely told me "no", that he wasn't in and told me just to rinse with warm salt water. I did what I was told and suffered through my weekend. By the time I was finally to be seen my dentist didn't even come in to see his handiwork.
Retention is the principle that describes how well the denture is prevented from moving vertically in the opposite direction of insertion. The better the topographical mimicry of the intaglio (interior) surface of the denture base to the surface of the underlying mucosa, the better the retention will be (in removable partial dentures, the clasps are a major provider of retention), as surface tension, suction and friction will aid in keeping the denture base from breaking intimate contact with the mucosal surface. It is important to note that the most critical element in the retentive design of a maxillary complete denture is a complete and total border seal (complete peripheral seal) in order to achieve 'suction'. The border seal is composed of the edges of the anterior and lateral aspects and the posterior palatal seal. The posterior palatal seal design is accomplished by covering the entire hard palate and extending not beyond the soft palate and ending 1–2 mm from the vibrating line.
An overdenture is a removable dental prosthesis that covers and rests on one or more remaining tooth roots. A removable partial denture is a dental prosthesis that replaces some teeth and is built around existing natural teeth. Both the overdenture and the removable partial denture may be connected to the remaining tooth roots or remaining natural teeth with anchors made of metal or plastic. These connections improve stability and the retention of both prostheses.